因子得分趋势面分析法提取个旧陡岩地区岩石化探异常  

Rock Geochemistry Anomaly Extraction by Factor Score Trend Surface Analysis in Douyan of Gejiu

作　　者：杨震[1] 杨明国[1] 胡光道[1] 梅红波[1] 

机构地区：[1]中国地质大学(武汉)资源学院,武汉430074

出　　处：《地质科技情报》2016年第1期17-21,共5页Geological Science and Technology Information

基　　金：云南省三年找矿行动计划整装勘查项目"云南省个旧市陡岩铅锌多金属矿详查"(Z201010)

摘　　要：云南个旧的陡岩一带具有良好的成矿地质条件,是近年来个旧西区地质找矿工作的重点。采用因子分析、趋势面分析对个旧西区陡岩一带1∶1万岩石化探数据进行了处理,重点提取了Sn矿化信息,得出该区异常主要受隐伏岩体和北西向地层、构造控制。R型因子分析表明,F3因子代表Sn-Mo元素组合,反映岩体及热液相关信息;F5因子代表Sn-Sr元素组合,Sr是碳酸盐岩中的常见元素,说明Sn元素部分来源于个旧组和法郎组灰岩地层。利用因子得分趋势面分析提取了局部剩余异常,再对剩余异常进行了多因子叠加处理,最后圈定出Ⅰ,Ⅱ号靶区作为下一步重点找矿区域。Douyan district, located in the southwest of western Gejiu, Yunan Province, is the focus of re- cent mineral explorations for its favourable metallogenic geological conditions. Factor analysis and trend surface analysis were employed to analyze the data obtained in 1 ： 10 000 rock geochemical survey in the Douyan. It is concluded that the Sn mineralization anomaly was controled by concealed magmatic rock mass and strata, tectonic of the northwest. R factor analysis showed that, F3 factor included Sn and Mo, and reflected information about magmatic rock mass and hydrothermal . F5 factor consisted of Sn and Sr （a common element in carbonates）, indicating that a part of ore-forming materials came from carbonate coun- try rocks. Factor score trend surface analysis was utilzed to extract the local residual anomaly, then super- imposed it. The delineated Ⅰ and Ⅱ target areas are the focus for further exploration.

关 键 词：因子分析 趋势面分析 靶区 陡岩 

分 类 号：P595[天文地球—地球化学]